<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>test</title>
    <style>
        body {
            margin: 0;
            padding: 0;
        }
    </style>
</head>
<body>
<div id="div1">
    <div id="div2">
        <div id="div3">33333333333</div>
        <input type="checkbox" id="c">
    </div>
</div>
<!--<script src="js/vendor/event.js"></script>-->
<!--<script src="js/element.js"></script>-->
<script src="./js/jquery-1.12.0.min.js"></script>
<script>
    $(document).ready(function () {
//        $('body').delegate('div', 'click', function () {
//            console.log($(this).attr('id'));
//        })

        $('#c').change(function () {
            console.info($(this).prop('checked'));
        })
    })
</script>
</body>
</html>